How much rebar or wire mesh is in it? Are the cracks wide or is it more the surface spalling / a poor mix of concrete type issue? The pony walls kind of sound like a subgrade prep, movement issue. Are they slab on grade or do those pony walls go down 1.5 meters to a footing?
I put lots of rebar in my bsmt floor and got very little cracking, at some relatives homes there are 1/4" to 5/16" cracks in spots. I was quite surprised that rebar isn't required in basements but mine got it.
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"The trouble with people idiot-proofing things, is the resulting evolution of the idiot." Me
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